Not incredibly expensive, and should work well at your level(AF feet are 60 so not sure why I added them).
Middle levels are dead, so people don't bother making some of that gear(Jaridah/Akijina especially) so they might be hard to find. If you can't get them, look for something much cheaper and actually available, or, just use AF, as bad as that sounds. Hands/Legs are pretty crappy but better than nothing I guess.
There aren't a ton of upgrades you need to worry about before 75.
Ohat, Crimson/Blood Hands, Osode, Relic Feet/Legs, higher Racc rings are all I can think of at the moment. A lot of your upgrades will depend on how much progress you had made before the hacking.
/Dancer would be the most useful sub for Soloing or Duoing. Xbow is by far your best bet for ranged weapon. Bloody to help heal yourself without using TP to often, Acid to speed up kills, Sleep if you happen to get a link you don't want to deal with, Holy for pure damage, Mythril/Darksteel for WS.
If you can't afford all that, I would use cheap bolts for TP and just swap in a mythril or something for Slug Shot.
If you have a higher job(or can go with your friend) I'd look in to getting Othinius Bow from Wyvernpoacher Drachlox in Gustav Tunnel. Would probably be your best weapon for a good while.
Quince is right, though I hate to think about it or admit it. No one wants a Rng for much of anything if they don't have Annihilator or Yoichinoyumi(They don't want this as much as gun). Gandiva or Armageddon are OK as well, for Voidwatch at least.
Not going to suggest you avoid it though, play whatever you want and go as far as you want with whatever job you like. Going to be ignored for one event or the other no matter what you pick anyways, so may as well do what you enjoy.